Home / 2,839.78-3,918.87-1,580.81

Finding the Fourth Proportional to 2,839.78, 3,918.87 and 1,580.81

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Solution

The fourth proportional to 2,839.78, 3,918.87 and 1,580.81 is: 2,181.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.78 : 3,918.87 = 1,580.81 : x
  2. Step 2: Convert to fraction form
    2,839.78/3,918.87 = 1,580.81/x
  3. Step 3: Cross multiply
    2,839.78x = 3,918.87 × 1,580.81
  4. Step 4: Simplify right side
    2,839.78x = 6,194,990.78
  5. Step 5: Solve for x
    x = 6,194,990.78/2,839.78
  6. Step 6: Final answer
    x = 2,181.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.